[1] Glasgow Caledonian Univ, Sch Hlth & Life Sci, Glasgow, Lanark, Scotland
[2] Kings Coll London, Sch Populat Hlth & Environm Sci, Fac Life Sci & Med, London, England
[3] Keele Univ, Sch Primary Community & Social Care, Keele, Staffs, England
[4] Midlands Partnership Fdn Trust, Haywood Acad Rheumatol Unit, Stafford, England
[5] Vrije Univ Amsterdam, Rehabil Med Clin, Amsterdam, Netherlands
[6] Glasgow Caledonian Univ, Yunus Ctr Social Business & Hlth, Glasgow, Lanark, Scotland
[7] Univ Glasgow, Robertson Ctr Biostat, Glasgow, Lanark, Scotland
[8] Univ Glasgow, Inst Infect Immun & Inflammat, Glasgow, Lanark, Scotland
[9] Univ Salford, Sch Hlth & Soc, Salford, Lancs, England